V310181.A

P

T T

PVSK Module with Integrated Diverter Valve and P-Disconnect Function

Tech Note

2

PVSK ModuleTech Note

520L0556 • Rev BB • Dec 2010

Table of Revisions

Date Page Changed RevJun 2004 All First edition AAJan 2010 8 Japan location ABJan 2010 4, 6 Drawings changed BADec 2010 8 New back cover BB

© 2010 Sauer-Danfoss. All rights reserved.

Sauer-Danfoss accepts no responsibility for possible errors in catalogs, brochures and other printed material. Sauer -Danfoss reserves the right to alter its products without prior notice. This also applies to products already ordered provided that such alterations can be made without affecting agreed specifications. All trademarks in this material are properties of their respective owners. Sauer-Danfoss, the Sauer-Danfoss logotype, the Sauer-Danfoss S-icon, PLUS+1™, What really matters is inside® and Know-How in Motion™ are trademarks of the Sauer-Danfoss Group.

Front cover illustrations: P300647, F300648, F300649 and F300650 drawing: 157-547

Revision History

Contents

Contens

Introduction ................................................................................................................................................... 3Specification and Code Numbers for PVSK Modules ..................................................................................... 3Specification and Code Numbers for PVSK Spools ......................................................................................... 3

PVSK ................................................................................................................................................................... 4

Dimensions ..................................................................................................................................................... 6Stay Bolt Set,PVAS for PVSK ..................................................................................................................................... 6

Specification Sheet ..................................................................................................................................... 7

3520L0556 • Rev BB • Dec 2010

PVSK ModuleTech Note

Introduction

Introduction

Sauer-Danfoss now introduces PVSK-modules with integrated diverter valve and P-disconnect function. The new module is intended for cranes, telescope lifts and other applications that have special demands on functionality and safety. The PVSK-module can be integrated in PVG 32 valve groups for open- as well as closed-centre systems.

Function of the PVSK-module:When the diverter valve is in neutral position, there is no pressure (only tank pressure) •in the P-channel of the valve group.When the diverter valve spool is actuated in A-direction, it enables the basic modules •in the PVG-group to receive pump flow supply.When the diverter valve spool is actuated in B-direction, it enables the ( • High Pressure Carry Over) HPCO-port in the PVSK module and the P-cannel in the valve group to receive pump flow supply.

Specification and Code Numbers for PVSK Modules

Symbol Description Code no.

Open and closed center inlet

With pilot supply for electrical actuation

Max. pump pressure 350 bar [5076 psi]Max. pump flow 120 l/min [31.70 US gal/min]

P= 3/4”HPCO= 3/4”

157B6961

4 way - 3 position spool for fixed displacement pumpHPCO flow 40 l/min [10.57 US gal/min]Open neutral position P -> T

157B9657

4 way - 3 position spool for variable displacement pumpHPCO flow 40 l/min [10.57 US gal/min]Closed neutral position P -> T

157B9658

PVSK spools 157B9657 and 157B9658 must be option mounted - see example page 7

Specification and Code Numbers for PVSK Spools

4

PVSK ModuleTech Note

520L0556 • Rev BB • Dec 2010

PVSK

PVSK

As the PVSK-module is provided with pump (P) and HPCO (High Pressure Carry Over) connections, the standard pump connection in PVP, PVPV or PVPM must be sealed with a steel plug (see example on page 6). Note that the steel plug is not included upon delivery. In neutral position, the spool in the PVSK-module interrupts the connection from the pump to the P-channel in the valve group. This not only ensures a low pressure (tank pressure) in the P-channel, but also a low pressure-drop in flow circulating between pump and tank (see diagram 157-521 on page 5).

As the PVSK-module replaces endplate PVS/I, the code number field (field 11) in the specification sheet must be left open. In general, the diverter function must be specified as a working function PVB, which means that PVE, PVSK spool and PVM must be specified separately (see example on page 7).

To ensure an adequate supply to the PVE pilot reduction valve, the tank channel of PVSK includes a backpressure valve. In open-centre systems, the pump flow must be min. 40 l/min (10.57 US gal/min) to maintain a sufficient pressure-drop across the backpressure valve.

V310135.A

P T

HPCO P

P PVB

PHPCO

HPCO P

P PVB HPCO

T T

P

T T

P

T T

P

5520L0556 • Rev BB • Dec 2010

PVSK ModuleTech NotePVSK

PVSK

PVSK Characteristics

Pressure drop P → T with PVSK spool in neutral position Pressure drop P → T in PVP

As the PVSK-module has an integrated pilot oil supply, always use standard PVP 32 without pilot oil supply in PVG 32 valve groups.

6

PVSK ModuleTech Note

520L0556 • Rev BB • Dec 2010

Dimensions

Dimensions

Qty, Basic modules L1 L2 Code no.Weight

kg [lb]1 95 165 157B8021 0.25 [0.55]2 143 213 157B8022 0.30 [0.66]3 191 262 157B8023 0.35 [0.77]4 239 311 157B8024 0.45 [0.99]5 287 360 157B8025 0.50 [1.10]6 335 409 157B8026 0.55 [1.21]7 383 458 157B8027 0.65 [1.43]8 431 507 157B8028 0.70 [1.54]9 479 551 157B8029 0.75 [1.65]10 528 600 157B8030 0.85 [1.87]

Stay Bolt Set, PVAS for PVSK

V310126.A

[1.46]

23[0.91]

85.5

[3.3

66]

A1

B1

A2

B2

A3

B3

A4

B4

16.5[0.650]12[0.47]

48[1.89]

23[0.91]24[0.94]

69.5

[2.7

36]

36[1

.41]

36.5

[1.4

37]

27.5

[1.0

83]

35[1

.38]

22[0.87]

95[3

.74]

48[1.89]

LL

1

2

24[0.94]

P

HPCO

24[0

.89]

62[2

.44]

24[0

.89]

T

Because of limited space conditions, PVE and PVM on the work sections have to be mounted as shown on the above drawing.

7520L0556 • Rev BB • Dec 2010

PVSK ModuleTech NoteSpecification Sheet

PVG 32

Specification SheetSubsidiary / Dealer PVG No.

Customer Customer No.

Application Revision No.

Function A-Port 0 157B 5100 157B B-Port

p = 100 bar 157B

a 157B 3171 1 157B 6130 157B 7004 13 157B 4216 c

b 157B 2100 LSA bar LSB bar 157B 2100 b

a 157B 3171 2 157B 6233 157B 7024 13 157B 4016 c

b 157B 2001 LSA 100 bar LSB 100 bar 157B 2001 b

a 157B 3171 3 157B 6230 157B 7004 13 157B 4016 c

b 157B 2001 LSA bar LSB bar 157B 2100 b

a 157B 3171 4 157B 6233 157B 7021 13 157B 4216 c

b 157B 2250 LSA 220 bar LSB 220 bar 157B 2250 b

a 157B 4216 5 157B 6961 157B 9657 13 157B 3171 c

b 157B LSA bar LSB bar 157B b

a 157B 6 157B 157B 13 157B c

b 157B LSA bar LSB bar 157B b

a 157B 7 157B 157B 13 157B c

b 157B LSA bar LSB bar 157B b

a 157B 8 157B 157B 13 157B c

b 157B LSA bar LSB bar 157B b

a 157B 9 157B 157B 13 157B c

b 157B LSA bar LSB bar 157B b

a 157B 10 157B 157B 13 157B c

b 157B LSA bar LSB bar 157B bRemarks

11 157B -

12 157B 8024

Filled in by Date

991L1865 ver. 03.2002

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w w w . s a u e r - d a n f o s s . c o m520L0556 • Rev BB • Dec 2010